某高层木混合结构抗震分析与性能测试  

Seismic design analysis and performance testing of a high-rise timber hybrid structure

作　　者：孙小鸾[1] 宗超 翟家骏 陆伟东[1] 王深山 程小武[1] SUN Xiaoluan;ZONG Chao;ZHAI Jiajun;LU Weidong;WANG Shenshan;CHENG Xiaowu(College of Civil Engineering,Nanjing Tech University,Nanjing 211800,China;China Construction Fifth Engineering Division Co.,Ltd.,Changsha 410082,China)

机构地区：[1]南京工业大学土木工程学院,江苏南京211800 [2]中国建筑第五工程局有限公司,湖南长沙410082

出　　处：《南京工业大学学报（自然科学版）》2024年第4期426-435,共10页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家自然科学基金(52378161)。

摘　　要：木混凝土混合结构在多高层木结构建筑中应用广泛,但此类结构的整体抗震性能以及楼盖动力特性有待研究。本文以江苏省康复医院医技楼为例,应用反应谱法与弹性时程分析法分别开展木混合结构的抗震性能分析,并对局部正交胶合木(CLT)楼盖通过原位测试,开展力学性能、动力特性以及人致振动研究。结果表明:结构抗震指标符合规范要求;CLT楼盖荷载位移关系呈双折线,挠度、应力理论计算时,建议板两端按简支考虑;CLT楼盖竖向自振频率均值约15.49 Hz,满足建筑楼盖限值要求,但在单人快走、单人小跑以及多人随机人致振动工况下,楼盖的峰值加速度偏大,应考虑增加现浇建筑面层,改善纯CLT楼盖舒适度不足的问题。可见,木混合结构通过设计可满足抗震要求,但轻质楼盖应注意舒适度构造措施。Timber-concrete hybrid structures are widely used in multi-story and high-rise timber buildings.However,there remains a need to investigate the overall seismic performance of such structures and dynamic characteristics of their building floors.This paper,using the medical technology building of Jiangsu Provincial Rehabilitation Hospital as a case study,employed both the response spectrum method and elastic time-history analysis method to evaluate the seismic performance of the timber hybrid structure.Additionally,it conducted in-situ testing to analyze the mechanical properties,dynamic characteristics,and human-induced vibrations of the localized cross-laminated timber(CLT)floor.The results showed that:the structure met the seismic resistance requirements.The load-displacement relationship of the CLT floor showed a two-fold curve.When conducting a theoretical calculation of deflection and stress,it was recommended to consider the slab as simply supported at both ends.The average vertical self-oscillation frequency of the CLT floor was about 15.96 Hz,which met the requirements of building floor limit value.However,the floor experienced significant peak acceleration under the conditions of single-person walking,single-person trotting,and multiple-person random vibrations.Thus,it was recommended to increase the cast-in-place building surface layer to enhance the comfort of pure CLT floors.In summary,timber hybrid structures can meet the seismic requirements,but attention should be given to comfort construction measures for lightweight floors.

关 键 词：木混合结构 CLT楼盖 弹性时程分析法 动力特性 人致振动 

分 类 号：TU398[建筑科学—结构工程]